Sound conveyer for talking machines



Dec. 2, 1924. 1,517,813

J. WOLFF SOUND CONVEYER FOR TALKING MACHINES Filed Oct. 19 1918 WITNSSES h 0., .1 Q 6 1 1 Patented flee. 2, 1924.

UNITED STATES PATENT OFFICE.

JOSEPH WOLFF, OF BROOKLYN, NEW YORK, ASSIGNOR TO SONORA PHONOGRAPH CORPORATION, A CORPORATION 013 NEW YORK.

SOUND GONVEYER FOR TALKING MACHINES.

Application filed October 19, 1918.

To all to hom it may concern:

Be it known that I, Josnrrr Your, a subject of the King of Great Britain and Ireland, and a resident of the borough of Brooklyn, county of Kings, city and State of New York, have invented a certain new and useful Improvement in Sound Conveyers for Talking Machines, of which the following is a specification.

My invention relates to improvements in sound conveyers for talking machines, and contemplates the provision of means to im prove the acoustic and resonant qualities of the reproduction.

One of the objects of my invention is to so improve and construct the sound conveyer for talking machines that the resonance and qualities of the reproduced sound will be increased, greatly improved and intensified, and to eliminate the brassy and metallic sound so prevalent in talking machines.

A further object of my invention is the construction and arrangement of a sectional sound conveyer for talking machines, so that it can be adopted for playing records having lateral undulations, and for playing records having the vertical or hill-and-dale cut, and having means so that the soundbox may be quickly and easily substituted for playing either style of records, and refers more particularly to the means employed to connect the several sections together and maintain a rigidity, flexibly within certain limits.

Another object of my invention is to allow the section of the arm to which the sound'box is immediately attached to be easily, quickly anl securely attached to the main portion or section of the conveyer.

A further object of the invention is the provision of means of the character described, which are extremely simple in construction, neat and attractive in appearance, thoroughly reliable and eflicient in purpose and operation and inexpensive and economical to manufacture.

With these and other objects in view, to be more fully set forth hereinafter, the invention consists in the novel construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter described in the specification and illustrated in the accompanying drawings considered together or separately.

Serial No. 258,898.

The inventive idea involved is capable of receiving a variety of mechanical expressions, one of which for the purpose of illustrating the invention, is shown in the accompanying drawings.

The invention will be first described in connection with the accompanying drawings illustrating one embodiment of my invention, wherein similar reference characters are used to designate corresponding parts throughout the several views, and then more specifically defined and indicated in the appended claim.

In the drawings,

Fig. 1 is a side elevation in section of a sound conveyor embodying my invention, with a sound-box in position for playing vertical cut records.

Fig. 2 is a side elevation of the same, with a sound-box segment in position for play ing records having lateral undulations, substitute for that shown in Fig. 1.

Fig. 3 is a detail of the bayonet oint connection between the sound-box carrying segment-of the arm, and the fixed portion thereof.

Fig. 4: is a sectional detail view of a universal joint, take on the line in Fig. 5.

Fig. 5 is a detail view of the universal joint, with the joint portion in vertical section, and the tubular portion in elevation.

In carrying out my invention, I employ a wooden sound conveyer, having a stationary member 1 provided with a sound passage 2 of greater diameter than the sound passage of the adjoining section; the lower end or base of the sound conveyer being formed with a circular projection 3, supplemental to a flange 4, to project into and rest upon an opening in a motor board partition, not illustrated.

In the upper end 5 of the sound conveyor 1, is arranged a universal oint 6 which connects with a movable arm segment 8 having a sound passage of less diameter than the member 1, and being provided with a metallic tubular part 7 projecting into the arm segment 8 and the sound conveyer 1 for the purpose of forming a tight joint, and as I have discovered that the use of such. a brass tube greatly improves and intensifies the acoustic and resonant qualities of the reproduction. The arm segment is connected by a bayonet joint 9 to the stylusbox carrying segment 10.

A concave recess 1-1 at the end-of the segment Skeeps itin close relation-to the end 5 of the sound conveyer 1 while not in ac tu'al contact therewith.

In Fig. 2, I have illnstrated'a stylus-box holding segment 13 for playing records having lateral undulations. 'lheuniversaljoint has an outer metal ring 14 fitted securely into the inside of end 5 of the sound conveyer 1, by ring 23 formingpart thereof. lVithinthe ring 14 is a member 15 pivoted th'ereto'by pins 18,18. The head 16 of'the tube T is pivoted t'o'the member 15 by pins 17, 17. The sonnd box carrying member and the movable arm seg'ni'ent are held together by a bayonet joint having a portion 19, and carrying upon its interior a "pin or projection 20, which engages'with slot 22 upon a cylindrical member 21 entering the portion 19.

The operation is as follows:

The sound conveyer 1 being placed in position by forcing the projecting portion 3 into a circular opening, and bringing the flange at, down uponjthe surface of the partition or motor'b'oard,-the arm is in opera tive position, and the arm segment 8 connected to the sound co-nveyer 1 by the universal joint 6 is "free to vibrate horizontally or vertically, by reason of the vertical and horizontally arranged pivots inthe universal joint.

In this connection it'is essential to note that the openings in the interior of the sound conveyer 1 and'segment 8, are practically one and continuous; and to the end that the exterior air be excluded, and the sound waves uninterrupted, I have provided the tubular oortion -7 of the universal oint which tol .l a

gether with the bayonet jointfi) forms an arm as perfect for my purpose asthongh cast of metal in one piece or constructed of a solid piece of wood, etc.

The sound waves passing'from the stylus box tow'ard'the elbow meet with'noobstruction, but "follow the'contour of the interior of the arm until they change their direction in the enlarged space of the sound conveyer.

I tind this abrupt enlargement at this point productive of excellent results, as it prevents the crowding and retardation which would follow a change of direction were the curve of the same diameter as the horizontal opening.

I also find a bayonet joint of vnlcanimal 'fibre, the most convenient and effective form of connection, as it is practically as unresponsive to vibrations as the material in the rest of the arml; and finally, I find that a wooden arm made in segments is cheaper to manufacture.

I11 accordance with the provisions of the patentstatutes, I have described the )rinciple of my invention together with the ap paratus which I consider represents the best embodiment thereof; but I desire it understood that my invention is not confined to the particular form of apparatus herein shown and described. the same being merely illustrative, and that the invention can be carried out in other ways without departing from the spirit of my invention, and therefore, I claim broadly the right to employ all equivalent instrumentalities com ing within the scope of the appended claim, and'by means of which the ob ects of my invention are attained, and the new results accomplished, as herein set forth; as it is obvious that the particular embodin'ient herein shown and described, is only one of many that can be employed to attain these objects and accomplish these lQSIlliS.

Having described my invention, \V'l'lflt I claim and desire to secure by Letters Patent is as follows Ina tone armi for talking machines, a stationary tubular member and a movable tnbular member, one of said members provided with a bell-shaped end piece which overlaps and conceals the end of the other member, means concealed by said members for securing said members in overlapped but spaced apart relation, said means including a tube fitting tightly within the bore of one of the members and supported by gimbels within the bore of the other member.

This specification signed and witnessml this 24th day of September, 1918.

JOSEPH WOLFE Witnesses E. VVOLF, ISADOR SOLOMON. 

